Category: C

An interaction between x-rays and matter in which the incoming photon is absorbed by the atom and leaves with the same energy in a different direction. Fewer than 5% of the interactions between x-rays and matter in tissue are of this type.  

A common name for sodium nitrate, NaN03; a crystalline powder, saline in taste and soluble in water.  

The cavity, lined with conjunctiva, that lies between the eyelids and the anterior surface of the eye.  

The outer fetal membrane that encloses the developing embryo.  

A tearing of the heart muscle that may occur after severe chest trauma (or in about 2% of patients who have suffered a myocardial infarction). It typically results in sudden cardiac death or tamponade.  

A law of joint kinematics that states that if a convex joint surface moves on a stationary concave surface, the convex joint will slide in the direction opposite that of the angular motion of the bone, and that if a concave joint surface moves on a stationary convex surface, the articular surface will slide in…

A cylindrical mass of purified and sterilized cotton used as packing or absorbent material in various dental procedures.  

The biochemical changes in the cervix that take place gradually over the last few weeks of gestation in preparation for childbirth. The cervix softens, and its potential for stretching increases. Normally this occurs naturally, but in postterm pregnancies it may be necessary to use mechanical dilators or drugs. Placement of Laminaria digitata or prostaglandin E…

A stricture of the body of the uterus; a circular area of the uterus that contracts around a part of the fetus.  

A narrow ring at the junction of the edge of the cornea with the conjunctiva; also called anulus conjunctiva.